Sewing-machine.



J. BERGER. SEWING MACHINE. APPLIOATION FILED NOV. 2, 1910.

1,133,608., Patented Mar. 30,1915.

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INVENTOR W/TNE E8:

ATJORNEY J. BERGER; SEWIEIG MAGHIHE. APPLICATION FILED HOV. 2, 1910.

1,133598. Patn'bed 30, 191.5.

W/TNESSES: 'iA/ VISA/f0 k 4 Mia. a A I 5 4n ATTORNEY citizen of the United States, residing at 5U attains .iosnrn BERGER, or BAYONNE, NEW JERSEY, ASSIG-NQB To THE smear, MAuUrao' TUBING COMPANY, A COBPO'ELATION OF NEW JERSE ssyvme-rir'acmus.

To all whom it, may concern:

- Be it known that I, JosErH BERGER, a

Bayonne, in the county of Hudson and State of New Jersey, have ihventedcertain new and useful Improvements 7 1n Sewmg-- Machines, of which the following is a specification, reference being had therein to the accompanying drawings This invention has for itsprimary object.

- to provide a seam covering machine for producing a covering seam presenting upon the under side two parallel rows of stitches and upon the upper side cross stitches formed by the covering thread unitlng' said parallel rows of stitches. V a In accordance with the present improvement, in its preferred form,'the mach ne is constructed with a frame comprising a bed and an overhanging bracket-arm, the main-i shaft being disposed longitudinally of the bed and parallel ,looper supporting and actuating rock-shafts being journaled in the bracket-arm and operatively connected; wlt-h the vmain-shaft. Jou'rnaled, for vertical reciprocation in'the bed is a needle-bar operatively connected with the main shaft and carrying a plurality of-needles disposed in longitudinal arrangement andadapted for cooperation with a single loop-taker, preferably in the form of an eyed-looper, mounted upon acarrier having a transverse fulcrum upon the looper-supporting rock-shaft and a crank-and-pitman connection with the looper-actuating rock-shaft.

As the looper is necessarily disposed at some distance above the top of the throatplate, means connected with the needle-bar actuating mechanism are provided for re-- ducing the. size of the loops thrown out by. the needles so as'to insure the normal c0- action of the looper with the needles for preventing the liability, to skipping of' stitches whichwould result from the described relation of the needles and looper relative to the throat-plate. The needle-bar carries a thread-arm formed with thread-- eyes through which the needle-threads pass to the needles from a pair of adjacent fixed thread-eyes intermediate'the same and f the needle-thread tension devices by means of which the needle-threads are drawn up to set the preceding stitches as the needle-bar moves upwardly 'in each stitch-forming c'ycle.

preferably used in "the machine.

Specification of Letters Patent. P e t djmm '30, 1915,, Application filed November 2, 19160. Serial No. 599,270.

shaft 1s a pair of spaced parallel cam-plates:

operating in con unction with a pair :of spaced arms mounted upon thevlooper-oarrier and embracing said cam-plates in such manner as to lead the looper-thread across the c am-shaped edges of the cam-p'lates for controlling the slack of the looper-thread.'

Thelooper-supporting rock-shaft is further I provided with a'nipper-arm adapted to'cooperate with a looper-thread nipping memberfixed upon. the which and the'looper-thread tension i arbracket-arm, between i ranged anarched thread-guide formed W1 h 1 alined thread holes between which vibrates ing rock-"shaft. In the accompany isa'fro'nt side elevation, partly 1n section, representing a sewing machine constructed 1n accordancewith the present invention,

spective views, the latter 'partly'in section,

showing a form ofip'resse foot which is t F igL- 7 is a perspective view representing the looper and the looper-thread take-up and nipping devices, and Fig. 8 a similar view, upon a larger scale, of the looper-carrier. Fig. 9 is a perspective view of the forward portion of the looper-supporting rock-shaft affording the bearing for the looper-carrier fulcrum-pin. V I l As represented in the drawings, the frame of the machine is 'constructed with the base 1 integral withlwhich is formed the hollow g drawings, -Figure 1 I perspective view repre--;

upright portion 2 of the bracket-arm formed with the tubular overhanging part 3 term' i= nating in the hollow head at providedwith the face-plate 5. Journaled within and longitudinally of the base is the main-shaft 6 carrying at its forward end the crank-plate 7 with: crank-pin 8 embraced by one end of: the pitman 9 whose opposite end embraces therrank-Pin l-O of a collar 11 fixed upon the needle-bar 12 'journaled in the vertical bearing bushings 13 of'the brackets 14 with which the base i is provided. The needlebaris provided at it s upper end withthe 16 disposed 'ina vertical plane parallei with the main-shaft.- 4 Mounted in suitablebearings 17 within and arranged longitudinally of the hollow overhanging member 3-of the bracket-arm isdisposed the looper-actuatingfrock-shaft 18 having fixedupon its rearward end a (201131 19 with-a lateral'crank-arm 20 pro-'- vided with the pin'21, einhraced bj the upper end of the pitman-rod' 22 "whose. opposite.

endeinhraces a crank 23 formed inthe rearward portion'of the main-shaft. Mounted in suitable bearings 24 and 25 in the bracket-.-

arm-head 4 and upright portion; 2 is; the 'looper -;supporting rock shaft 26' arranged parallel'with 'the main-shaft and.-with' 't he rdck-shaft'lSand having fixed upon its rear ward end the hub27 of yadepending arm 28. provided at its lowerend with a split-fork 29lwhichgemhraces anv actuating eccentric '30 of the rnain-shaft adjacent the crank 23.. The forward end of the looper-supportingrock shaft 26,-.is formed vwitll a.fiattenedv head .31" having 'a' depending portion-p 01. vided with a" transverse aperture 32:;and is formed with} a forwardly projecting flange" 33 with screw-apertures 34 the: object of" which will-"be laterdescribed; Mounted the aperture '32 V of 1,the rock-shaft head-31 the fulcrum-pin '35 which enters hrace the rock-shaft head31," The ,loopercarrier is formed with a" depending lug 38' provided in one face with recesses39 'and iO- to afford 'seats for amembe'r of the take-up an dthe shank ofthe loope'r respectively. -Y'L-he looper herein'shown is of the double y thain-stitchtype and comprises a. hlade having a thread-eye- 4:2 near its point with adjaeent-thread-groove' 43 in one side lead- -ing .to"a" second thread-eye 44in the-heel,v

and-has the usual shank 45 inian'gular' arrangement with the blade and providedwith a transverse butt end 46 securedwithin the seat- ,40 of the looper-carrier by means of the fastening screw 47 entering a threaded aperture 48 in the-latter. .To the shank ofthe looper is secured'by means of the'fastening-screw 49 the shank 50 of the looperguard whose blade ol extends somewhat in advance of the loop er point and is main- -t'ained spaced therefrointo attord a space f'orpassage of the needles toy-means of the adjusting screw 52 whose reduced'extremity, which enters an aperture in t'he-looperguard, cooperates with the fastening screw 49 in maintaining the looper-guard' in overv lying relation with the looper-blade.

-.The looper-carrier is formed with alateral arm having an eye 5* in which secured a ball-stud 55'embra-ced by a strap 56npon the lower enduof a pttnnan-rod 57 wh'ose upper end is provided with a strap twin-needle clamp 15 carrying-the needles looperacar'rier and thus'to the 1 ooper, -it-s sidewise or needle-avoiding movements.

' Extending .forwrrdlyirOm the needle clamp is a rigid thread-arm 61- .whose up turned end portion .62 has a pair-of vertically arranged thread eyes 63; and flied upon the casing'fi beneath the work-plate 65,by means of the fastening screw 66 pass ing through'its foot 67 a-guide-arm 68.- prorided with the thread-eyes 69 through which'ttie needle-threads are led from the tension devices 70 and 71 to the eyes 63 jot carrier rock-shaft 26 serves to impart to the the thread arm 61 from which they are led through the apertures 72 formed ina guideflange 7 3 of the needle=clamp to the eyesof, the needles. The casing-64L is provided in: v

termediatethe guide-member 6'8 1 and threadarm 61' with a guide-finger 74 having a foot: piece 7 5 formed with-a slot 76 entered bya fastening screw 77 by means of which it is adjustably secured in place. the 'alined apertures- 36.0fthe-spaced mem hers-3T of. the looper-carrier-37 which em J ournaled upon the needlebar actuating I crank-pin 8 by means of'the aperture 78 at the. unction of its arms is an elbow-lever thread'-engaging.=arm 7 9 and; a depending arm 80 formed with a; transverse slot 81 entered byafastening screw. 82- by means of 4 which it is "adjusta'blyseeured upon thepit' seen by reference more particu- -A Willbe 'larly to Fig. '4, the'.needle-thread a is led afrom the tension device 70 through the outer thread-eye 69 of the guide-member 68 beneathuthe thread-finger 74 over the threadarm 7 9, through the lower eye 63 of the arm 61- and' thence through one of the eyes T2 to- 1 the eye of the inner and longer needle 16.

The threadib is similarly-led from the ten sion 71 through the inner thread-eye he neath the finger 7%,o'verthe thread-arm 79, through the upper guide-eye 63 and thence to'the eye'of the outer and shorter needle As the crank-pin 8 revolves and imparts the reciprocatory movements to the 1 needles the throat-plate 83, the rigid thread-arm 61 .rises with the needle-bar andbends the needle-thread's'.leading to its eye 63 from the through one of the needle-clamp eyes T2 100' formed with an upwardly curved lateral a ,rsaeos set the preceding stitches. In the continued rotation of the crankch18 thereafter, the thread-arm 79 is carried bodily outwardly and upwardly and then inwardly toward the threads, engaging first the needle-thread a of the-inner and longer needle, and then the thread'b of the shorter needle, so as to draw in different amounts of slack just as the needles begin their descent to throw out their thread-loops, the slack thus drawn in being I ed with and actuated by the needle mechanism therefor acts'upon the needle-thread first at the end of the advance movement of thread-loops for seizure by the loop-taker.

Secured by the fastening screws 84: upon and spaced apart by means of the flange 33 ofthe rock-shaft head 31 are the parallel 1 cam-plates 85 each formed with curved outer I; t'hg-mroh the taken) device to so. 1

or forward edge. 86 terminating near the bottom in a peripheral notch 87. Secured in suitable radial sockets 88 of the looper -carrier members 37 x are the thread-guide rods 89 embracing and spaced from the camplates and each provided with a threadeye 90 within the cam-shaped periphery of the adjacent plate 85. transverse seat 39 of the looper-carrier lug 38 bv' means of the screw 91 is the shank 92 of a 'cast-ofi member 93 having at its outer end an angularly disposed thread-engaging finger 9 adapted for movement in unison with the rods 89 upon the looper-carrier but intermediate the cam-plates 85 and slightly in advance of the members 89 in their downward movement. I

The looper-thread c is led from the source of supply through an eye 95 of a bracketpiece 96 secured by means of a screw 97 upon the forward cam-plate 85, thence through the eye of one of the vlbratory rods 89, around the operative edges of the camplates 85 through the eye of the other rod 89. and thence downwardly through the eye in the heel of the looper to the looper-point.

' In the operation of the machine, when the looper is retracted, the thread-eyes 9-5 and 90 are in substantial alinement, and the looper-thread passes freely through the takeup device. As the looper advances to seize the needle-thread loops, the slack thus formedbetween the looper-point and the work is gradually taken up by the action of the cam-plates intermediate the eyes of the vibratory rods 89, but threadfrom the source of supply is permitted to pa fr Secured upon the thread leading from the material to the advanced looper-point. vance position, the looper moves sidewise and begins to recede, the slack looper-thread thus produced being drawn in by the engagement of the thread intermediate the members 89 with the notches 87 of the camplates, until the inclined cast-off finger 94 forces the detained loop of looper-thread outwardly clear of the notches 87 when the strain upon the looper-thread is entirely removed preparatory to the production of the succeedingstitch.

The crank-arm 60 upon the looper-actuating rock-shaft 18 has securedthereon by means of screws 98 the foot 99 of a rearwardly extending pull-off arm 100 passing through a slot 101 in the head of the bracketarm and adapted for vibratory movement between the spaced limbs of an arched guide-member 102 formed with alined thread-apertures 103 and provided with a foot-piece 101 secured by means. of screws 105 to the head at of the bracket-arm. The

looper-thread passes from the source of supply through the tension device 106, thence. through the apertures 103 of the guidemember 102, and through a guide-aperture 107 in the upper portion of the face-plate 5 to an aperture 108 in a flat nipper-spring 109 whose shank 110 is secured upon the outer side of the face-plate 5-by suitable means. As the thread emerges from the aperture 108' it rests against the forward face of the nipper-spring 109 and passes to theguide-eye 95 of the looper-thread takeup device as before explained. Fixed upon the forward end portion of the looper-supporting rock-shaft 26 is a collar 111 formed with an upwardly projecting portion 112 to which is secured by means of the screw 113 In its extreme ad-,

the arm 11% having an outwardly extending member 115 passing through an aperture 116 in the faceplate 5 and resting upon the adjacent face of the nipper-spring 109, and thus affording a movable jaw for nipping the looper-thread between itself and the adnipper-member, ,1 09 V and the movement of .1,

the rock-shaft 18 in retractiiigfthelooper raises the pull-off arm 100 so as to draw through the tension device 106a supply of thread for the succeeding'stitch, the retraction of the loo t the same time serving 1 L 1, IL

the :tLLClL "just formed.- the looper performs its sidewise movement to the loop-seizing plane,

the nipping device is opened, and the thread is allowed to pass freely between the tension and the take-up, which latter operates as previously described in controlling the slack I versely of the main-shaft 6 is a tension rerocking lease rock-shaft 118 upon which is fixed the hub 119 carrying two angularly arranged arms 120 and 121 provided 'with wedgeshaped oflset extremities 122 adapted to enter the space between the tension disks 70 and 71 to separate-them for release of their pressure upon the needle-threads. The rock-shaft has upon its opposite end a crankarm 123 through an aperture in which passes the pull-rod 124 with hooked upper end 125 engaging the presser-foot lifting rock-lever 126 in a manner well known. The two parts of the rod 124 are adjustablys'ecured to-.

gether by means of the coupling 127 ,jthe

lower end of which engages the top of the crankearm 123 when the pull-rod is drawn downwardlyt'o lift the presser-foot, thereby rocking the shaft 118 to open the needlethread tension disks; 1

The machine is provided with a common form of feeding mechanism comprising the feed-dog 128 mounted upon the feed-bar 129 connected with the feed-rocker 130 actuated by suitable connections with the eccentric 131 upon the main-shaft, the feed-bar being provided with a yoke 132 embracing the feed-lifting eccentric 133 upon the' mainshaft'adjacent the crank-plate 7.

The pressen-bar 134 is suitably journaled in the head 4 of the bracket-arm and pressed downwardly by means of the flat spring 13:) and has secured to its reduced lower end by means of the screw 136 the shank 137 of a compensating presser-foot formed withparallel vertical guidewaysto each of which is fitted an upright arm 138 of one of the foot plates 139 and 140 which are arranged side by side, the members 138 having rear wardly projecting pins 141 entering slots 142 in a plate 143 fulcrumed upon the presser-footshank 137 by means of the studscrew 144; The foot-plate 139'is the broaden of the two and has at its inner edge the stitch-receiving tongue 145 separated from the body of the foot by the'needle. aperture 146, another needle aperture .being afforded by the space 147 between said tongue and the adjacent edge of the other foot-plate 140. The stitch-receiving tongue 145 is made of wedge-shape by cutting away its top rearwardlv in. order to readily deliver the stitches formed thereon, the needles rising through the forward extremities of the needle apertures and their threads beingunited by the looper-thread laid transversely across thev tongue 145 from whichthey are drawn by. the advance of the work under the action. of the feeding mechanism.

a As one of the chief objects of the present improvement to provideme ans for uniting and covermg the margin of a hem'upon the body fabric, requiring one needletto penetrate two plies and the other needle to penetrate a single ply of material, the '00 -t pensating presser-foot "just described is deseam is designed to overlie the margin of v the upper ply of fabric, the presser-plate 139 i which overlies the upper ply of material is made considerably wider than thepresserplate 140 and the stitch-receiving tongue is made in the former so' as to overlie the stitched edge of the fabric. 1

From the foregoing-description, it will be readily understood that the present improvement is susceptible of considerable modification of .the construction and arrangement of its various parts within the scope of the invention, and that certain of the features omitted without materially affecting the op-- eration of the others.

Having thus set forth the nature of the invention, what I claim herein is described may be modified or- 1. In a sewing machine, the combination with the frame comprising a base provided with needle-bar bearings and an overhanging bracket-arm, a main-shaft journaled in the base, a looper-actuating rock-shaft jour: naled in and extending longitudinally of 'ioo the bracket-arm, and an'opera ive connection between said shafts, of a reciprocating needle-bar journaled in said bearings and carrying a needle, a looper-supporting rock shaft journaled in the bracket-arm; a looper mounted upon said supporting rock-shaft and adapted to oscillate upon an axis transverse'thereto and to seize thread-loops from the needle, means connected with the looperactuating rock-shaft for imparting to said looper its endwise operative movements, and

.means Ior rocking the looper-supportmg rock-shaft to impart sidewise movements to the looper.

2. In a sewing machine, the comb nation with the frame comprising a base provided 'wlth needle-bar bearings and an overhanging bracket-arm, a main-shaftjournaled in the base, a looper-actuating rock-shaft journaled in and, extending longitudinally of the. bracket-arm, and an operative connection be-l a needle, a looper-supporting rock-shaft tween said shafts, of a reciprocating needle- 1 jour-naled in the bracket-arm, a looper v mounted upon said supporting rock-shaft and adapted to oscillate upon an axis transverse'thereto and to seize thread-loops from the needle, means connected with the looperlooper its'endwise operative movements, and

an operative connection between said loopersupporting rock-shaft and the main-shaft whereby sidewise movements are imparted to the looper. I

3. In a sewing machine, the combination with the frame comprising a base provided with needle-bar bearings and an overhanging bracket-arm, a main-shaft journaled in the base, a looper-actuating rock-shaft journaled in and extending longitudinally of the bracketarm, a looper-supporting rock-shaft also journaled in the bracket-arm parallel with the looper-actuating rock-shaft, and operative connections between the mainshaft and said rock-shafts, respectively, of a reciprocating needle-bar journaled in said bearings and carrying a needle, {HIOPEI'iItlVB connection between said needle-bar and the main-shaft, a normally stationary threadguide adjustably mounted upon 'said base,' a needle-thread take-up arm rigidly mounted upon the needle-bar and provided with a thread-guiding eye, a looper pivotally mounted upon the looper-supporting shaft, and an operative connection between said looper and the looper-actuating rock-shaft.

l. In a sewin machine, the combination with the frame omprising a base provided with needle-bar bearings and an overhanging bracket-arm, and a main-shaft, of a reciprocating needle-bar journaled in saidbearings and carrying a needle, an operative connection between the main-shaft and said needle-bar, a loop-taker cooperating with the needle in the production of stitches and mounted for operative movement in the bracket-arm, and means acting while the needle is in the work for partially drawing up the needle-thread to reduce the loop offered by the needle to the loop-taker preparatory to the advance of the latter to seize a thread-loop.

5. In .a sewing machine, the combination with the frame comprising .a base provided with needle-bar bearings and an overhang,- ing bracket-arm, and amain-shaft, of a reciprocating needle-bar journaled in said bearings and carrying a needle, an operative connection between the ma n-shaft and sald needle-bar, a loop-taker cooperating with the needle in the production of stitches and mounted for operative movement in the bracket-arm, and thread-drawing means provided with actuating and controllingmeans acting intermediate the arrival of the needle at an extreme position. and the adjacent loop-seizing position whereby it is caused to act upon the needle-thread twice while the needle is in the work and previous to seizure of a needle-thread loop by the loop-taker.

6. Inia sewing machine, the combination rvith the throat-plate, off a plurality of upwardly directed reciprocating needles adapted to carry loops of needle thread up: wardly through said throat-plate, a looptaker mounted above said throat-plate and adapted to' cooperate with said needles in the production of stitches, actuating means for said needles and loop-taken and threadby the loop-taker.

T. In a sewing machine, the combination with the frame comprising a base provided! with needle-bar bearings and overhanging bracket-arm, and a main-shaft, of a reciprocating needle-bar journaled in said bearings, a plurality of needles mounted in said needle-bar, an operative connection between the main-shaft and said needle-bar, a looptaker cooperating with said needles in the production of stitches and supported by the bracket-arm, actuating means for said looptaker connected with the main-shaft, and thread-drawing means provided with actuating and controlling means acting during the recession of the needles from extreme position and prior to seizure of thread-loops therefrom by the loop-taker whereby it is caused to act differently in reducing the size of the loops thrown out by said needles 7 for seizure by the loop-taker.

8. In a sewing machine, the combination with the main-shaft, of a reciprocating needle-bar carrying a needle, an-operative connection between the main-shaft and said needle-bar, a loop-taker cooperating with the needle in the production of stitches. a needle-thread tension device, and threaddrawing means including a pivotally mounted' thread-engaging element acting upon a portion of the needle-thread running freely from the tension device to the needle, said thread-drawing meansbeing provided with actuating and controlling means whereby it is caused to act upon the needle-thread twice while the needle is in the work and previous to seizure .of a needle-thread loop by the loop-taker. I

9. In a sewing machine, the combination with the throat -'plate, of a plurality of reciprocating needles adapted to carry loops of needle-thread through said throat-plate, a loop-taker adapted to cooperate with said needles in the production of stitches, actuating means for said needles and loop-taker, thread-drawing means comprising a plural ity of cooperating thread-engaging elements movable relatively to each other and in corinthe production of stitches,

tal-zer whereby the thread-engaging elements V are caused to act diflerently in reducing the for seizure by the loop-taker.

' 0. In a sewlng machine, the combination with the throat-plate, of areciprocatmg needle movable throughvsaid throat-plate, actuatmg me'ans for sa1d needle, a thread carrying looper cooperating with said needle I in the production of stitches, a looper-supporting rock-shaft carry ng a transversely disposed fulcrum-pin upon Which'said looper is mounted, a looper-thread take-up also mounted upon the looper-supporting rockshaft, means for actuating the looper-supporting rock-shaitand means for rocking said looper upon its fulcrum with a frequency corresponding with that of the said movements imparted to the rock-shaft,

11. In a sewing machine, the combination with the throat-plate, of areciprocating needle movable through said throat-plate, actuating means for said needle, a threadc'arrying looper cooperating with said needle a looper-sup- 1 porting rock'shaft carrying a transversely d sposed fulcrum-pin, alooper-earner mounted upon said fulcrum-pin, a looperthread engaging cam-plate fixed upon said looper-supporting rock-shaft and having ,operative edges in eccentric relation to said fulcrum-pin, a pair of thread-eyes embracing said cam-plate intermediate the operative edge for the same and said fulcrumpin and sustained by .s'aid looper-carrier,

actuating means for said looper-supporting rock-shaft, and meansindependent thereof for rocking said looper-carrier upon, its fulcrum-pin. 1

12. In a sewing machine, the combination withthe throat-plate, of a reciprocating needle movable through said throat-plate, actuating means for said needle, a threadcarrying looper cooperating withsaid needle in the production of stitches, a looper-supsize of the loops thrown out by said needlesporting rock-shaft carrying a transversely disposed fulcrum-pin upon which said looper is mounted, alooper-thread take-up also 'mounted upon the looper-supporting rockshaft, means for actuating the looper-supporting rock-shaft, alooper-thread nipping mem'benmounted upon a fixedsupport', a

looper-thread nipping member carried by the dis'phsedfulcrum-pin upon which said looper is mounted, j alooper-thread mounted upon the looper-supporting rockshatt, means for actuating the looper-supporting rock-shaft, alooper-thread nipping member'mounted upon' afixed support, a looper-thread nipping 'member carriedby the loop'er-supporting rock-shaft and movable toward and from the fixed nipping melnben for intermittingly engaging the intake-up also terposed looper-thread, a looper-thread tension device, a pair of spaced thread-eyes intermediate said tension device and the nipping device, a looper-thread fixed upon said looper-supporting rockshaft and having a path of movement between said spaced thread-eyes, and means for rocking said looper upon its fulcrum-pin.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses. 1 JOSEPH BERGER.

IVitnesses 1 HENRY J. MILLER, HENRY A. Konxmmxs, Jr.

pull-oil arm 7 

